The milk suggestion was just a readily accessible source of a modest number of carbs, that could be consumed in moments (sort of popping out the the kitchen moments). I'm sure there would be many other options. I know I would hate that roller coaster of going very high, from a low point.
I do understand it's not always possible to eat, as planned, or to govern how long unexpected delays might last.
Edit:
@Scandichic - just to add, you may have had a mild hypo, the your liver dump pulled you above the threshold, without the feel-good factors?